Shock-deadener for vehicles.



PATENTED JAN. 7, 1908.

G. DUMOND. SHOCK DEADENER POR VEHICLES.

APPLIOATION FILED ITULY 30, 1906.

30 hicie.

y IUNITED y'STATES .PATENT oFEIcE."

GASTON DUMOND, or PARIS, FRANCE.

SHOCK-DEADENER Fon VEHICLES.

f No. 876,154.

To all whom it may concern: Be it known that I, GASTON DUMoND, engineer, citizen of the French Republic, residing at Paris, Department of the Seine,

5 France, and having post-ofiice address 40 Rue 4de Villejust, in the said city, have invented certain new and useful Improvements in Shock-Deadeners for Vehicles, of whichY the following is "a specification.

l The invention has for its object a device for deadenin shocks and reactions for vehicles of all kinds, whether for mechanical or animal traction, or even for fixed installations;` This shock-absorbing device is attached, on the one hand to the frame, and on the other to the axle, either directly or by the intermediary of the spring. It is jointed both to the frame and to the axle.v

Iwill describe my said invention with reference lto -the accompanying drawing which is alongitudinal'section of the apparatus.

The device when applied to al vehicle is constituted by a cylinder 1 in which there is mounted a'piston 2 the rod 3 of which asses '25 throngha stuffing box 4 mounted in t e upper end of the cylinder'.l The extremity of the piston rod is connected by a joint 6 to the frame 7 and the lower end of the cylinder is connected by a joint 8 to the axle 9 of the ve- The object of these joints which for example may be ball and socket joints is to permit the piston to work in the cylinder notwithstanding the displacement of the frame relatively to the axle. The plston 2 is able to move with slight friction orievenwith a little play in the cylmder'l. In order to prevent binding and bythis means permit of perfect adjustment o the apparatus, the 'bearing surface of the 40v piston is given an arched form', by which means the vpoints of contact with the cylinder are reduced; in this connection the spherical form is the ideal form.:

A piston with guiding means, such as slide- Ways,rol1ers or "the like, might equally well A.be-employed. f

The two extremities of the cylinder communlcate one with the other, either by means oflay'existing between the piston and the cyhnder, or by.meansof holes 10 formed Specification of Let/ters Patent. Application med .my 30.1906. 'Serin No. 328,465.

Patented Jan. 7,1908.

a liquid and it may be introduced by unscrewing the cylinder Vcover or through an inlet branch provided with a cockv 12.

The apparatus having been filled, under the iniiuence of a Shock the pistonl will tend to descend in the'cylinder. A portion of the fiuid passes into the upper part of the cylinder, experiencing a certain resistance; when the re-action takes place, the piston tends to resume its original position under the influence ofthe spring 13, and the return Vof the fiuid towards the lower part of the cylinder opposes a retarding resistance to'this effect.

pressure vessel 14 communicating with the .lower part of the cylinder by means of a hole 15 might be added to the a paratus; when a shock occilrs a portion of t e fiuid is then able to pass into this vessel, and after the shocky the fiuid contained in the vessel which would be in a state 'of compression would assist, owing to its expansion, in returning the apparatus into its position of re-v pose. It shou d however be understood that this is a sup lementary and not an obligatory addition. other optional addition is the revision of a small chain-fixed" on the one and to the frame and on the other handto the piston rod in proximity` t`othe ball 'and socket joint; this arrangement would prevent the system from falling in case of injury to the joint.

Havinfr thus described and ascertained the nature o? my invention and in-what manner the same is to be performed,'I declare that what I claim is z A double-acting shock absorber for vehi A i cles comprising a closed cylinder containing a iiuid andan archeshaped piston of such diameter astorovide a space between it'and the wall of tiie cylinder, thereby establishing communication between that ortion of the l cylinder above the piston an that portion lbelow it, said'pistondfurther provided With e myhend in pesenceoif` two subserhing j "port, and a; s ring-controlled double-acting nesses.

valve mounte in said port, said port further v GASTON' establishing communication between that 5 portion of the o lnder above the piston andl Witnesses:

that portion be ow it. v .Y v EMILE KLoTz In testimonywhereof I have hereuntoset t MAUDE RIYAUD. 

